You purchase credits at a discount to the face value that you claim on your state income tax return. Use credits in a year that you have high tax liability, or make it a habit and reduce the cost of your state income taxes annually. Taxpayers may use conservation credits to the full extent of their state income tax liability up to $52,500 in any one year. Any unused portion may be carried forward until used or transferred.
Angel credits can be used in any amount and in combination with conservation credits. Angel credits can be carried forward for up to 9 years from the year they were originally earned.